BOSTON — The Boston Celtics signed first-round draft pick Robert Williams.

The team announced the signing Thursday. Terms were not disclosed. Williams, a forward-center out of Texas A&M, was selected 27th overall last month with the Celtics’ lone draft pick.

Williams’ signing comes days after he received a lecture from the team about accountability following a pair of off-the-court incidents. The 20-year-old slept through a scheduled conference call with reporters the day after the draft and then failed to catch a flight from his native Louisiana to Boston in time for a summer league practice.

Williams will wear jersey No. 44.

n Boston signed free-agent guard Brad Wanamaker earlier this week. He spent his last two seasons in Turkey and played with Celtics forward Daniel Theis for two seasons in Bamberg of the German Bundesliga. And he was able to gauge his jump to the NBA based on his former teammate’s own transition to the Celtics.

“It’s definitely motivation. Just playing two years with him in Bamberg in Germany, I knew the type of player he could be and just seeing him fulfill his dream and get out here and give a team good minutes before his injury was great,” said Wanamaker.

“(What he showed was) you stay with it. You work and keep your confidence high. ”

76ERS: Nemanja Bjelica is moving from Minnesota to Philadelphia.

A person familiar with the negotiations says Bjelica has agreed to a one-year contract with the 76ers worth nearly $4.5 million.

Bjelica gives Philadelphia more shooting depth, needed in an offseason where the 76ers lost Ersan Ilyasova and Marco Belinelli.

Bjelica shot 42 percent from 3-point range last season, his best clip in his three NBA years. Bjelica, 30, had a long career in Europe before coming to the NBA with Minnesota in 2015.

He was originally drafted by Washington in 2010.

MAGIC: Isaiah Briscoe, a 22-year-old point guard born in Newark, New Jersey, agreed on a deal, ESPN reported and the Orlando Sentinel confirmed.

The Magic could finalize the contract after the NBA lifts its moratorium period at noon Friday.

Although the terms of the agreement are unclear – and it’s possible the deal will be partially guaranteed for the 2018-19 regular season – it appears Briscoe has a very real chance of making the opening-night roster.